Visuliaztion of Item Information Curves In R

blog

Author

Jihong

Published

January 10, 2019

Item Information Curve

This blog is to show a new way to display item information curves using ggridges package. The ridge plot could show the IIF plots very clear when you have a large number of items.

⌘+C

ggplot(item_information_all %>% filter(item %in% 17:22)) +
  aes(x = factor, y = item, height = info, 
      group = item, color = as.factor(item), 
      fill = as.factor(item)) +
  ggridges::geom_ridgeline(alpha = 0.75) +
  ggtitle("Peer Social Capital: Information Functions")  +
  theme_ridges()

---
title: Visuliaztion of Item Information Curves In R
author: Jihong
date: '2019-01-10'
slug: visuliaztion-of-item-information-curves-in-r
categories:
  - blog
tags:
  - R
  - ggplot2
---

![Item Information Curve](information_curve.png)

This blog is to show a new way to display item information curves using `ggridges` package. The ridge plot could show the IIF plots very clear when you have a large number of items.

```{r, eval=FALSE}
ggplot(item_information_all %>% filter(item %in% 17:22)) +
  aes(x = factor, y = item, height = info, 
      group = item, color = as.factor(item), 
      fill = as.factor(item)) +
  ggridges::geom_ridgeline(alpha = 0.75) +
  ggtitle("Peer Social Capital: Information Functions")  +
  theme_ridges()
```